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Series
(Monocjraphs)
ICMH
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microfiches
(monographies)
Canadla.i Institute for Historical Microreproductions / Inatitut canadien de microreproductions historiques
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2f
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n
D
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D
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1
2
3
1
2
3
4
5
6
DEPARTMENT OF THE INTERIOR
CANADA
Hon. W. J HocuE, M'Utter. W. \V. Cort, CMC, Depulj/ MmitUr.
PUBLICATIONS
Dominion Observatory
OTTAWA
W. F. KixG, C.M.G., LL.D., Director.
Vol. II, No. 13
/)
Orbit of B.A.C. 5890
BT
T. H. PARKER, M.A.
CAl
MT i+03
P02-13
OTTAWA
GOVEKNMENT PRINTING BuREAU
1915
.•a^v=
'"rniF
pni YTFrHNIOUE BIBLlQIHEOilF
I
L>-v, ,L_ I
p]V' inyurAiir
DEPARTMENT OF THE INTERIOR
CANADA
l!,,v W .1 R.KiiK, U.u.vr W. \V. CuKY, C.M.U,, />fj<u/j/ W.riuler.
*^'
\*
PUBLICATIONS
OF THE
Dominion Observatory
OTTAWA
W. F. KiNc, C.M.G., LL.D., Director.
1
I
Vol. II, No. 13
Orbit of B.A.C. 5890
BY
T. n. PARKER, MA.
84737—1
OTTAWA
Government Printing Bureau
1915
m
<r^ I
(U{l<I'l' oi u.\r. asuo.
' m T. II. rAKKKK, MA.
Tliis Star i«-17'' 2r":<. 5=-;'") wa.s cuntiniicl a> a spcctroscupic
hiiiary hy Mr. Hums fruiii tlu' iii-asuivs of a plat.- ohtaiuctl at tlic I.ick
( )l,.s,>rvat(.ry oi. .lun.' 21, I'.tO.".. This plate showed a .louhlii.n of the
lines with a rati., of intensity of about two to one. Two plates ha.l l.een
previously ol.taine.l in IS'.K) aiul \m) which had only sinsjle lin.'s. In
.\. .1. Vol. 27), a list of measures of ei^tht plates is ^iven. Of this series
three (iave the veh)eities •)f i ulh (•onii)onents with a ran(;e of i:.l km. Th<'
star is an F-typo, with fairly broad lines and is of photoRraphie magnitude
1-9. The following orbit was determined from the measures of nineteen
I)lates taken at Ottawa showing both spectra, together with the three Liek
observations already mentioned. A larne ntunber of plates of this star were
obtaine.l here, which were later found to be unsuitable in the determination
of the orbit on account of the blendinfi of the two spectra. The latter were
only found separated near the primary maximum. Fortunately, however,
one of the Lick observations showed double linns at a i)haso near apastron
due to the larger dispersion of the Mills spectrofrraph. The velocities given
by this plate were of great use in finding the values of K in the case of
each component, as will be noted later. In all thirty-one lines were
measured on the various plates of which about a dozen occurred but a few
times. A selection was made of .>l<'ven of the best lines remaining for
which the wave-lengths were corrected as follows:—
TABLE I.
KItnnonl.
Iron
MaRneeium .
Mapiesium-Chrciiuium..
Hydro|!;(?n
Iron
Iron. .
Wavp-I.en(jth.
4549-7.53
4481-548
4:5.52-035
4340-t)4«
4271-680
42PO-B54
Elf-mpnt.
Magnesium-Iron.
Iron
Iron.
HydroRpn
Iron.
Wavp-I^ngth.
4233 483
422rt-968
4143-832
4101 890
4045-935
;i:v.'
I'l lu.n \ 1 1"^- "I I 'I' ""
IkiMIMkN li|l-ri(\ \i"in
.,.(1 III I'lir fcillnWIIIU >nluli<)ll-. TIlCSC
.litrrillilir.l llnlii ;i ili-cu--ii>ll "I ill"'
\ ^uniMKin nf ,1„. ,.l..■.■^M.lo.l~ iM.l 1^ .-'.I in Hi- (-..U-in. '.M...
,„ T,!,!,. II uill 1>. lo'.ml tl,.. l.ii'k ..i.Miva.iun^ .^uulz Hh' M'loni,..^ a~
W„„llv , Miunii.in.l irnin .!.• iluv,-,.,- I.v 1 VM v. ,1,,. .lulian ihv U,r r:.U
,,,,„;,„,„.,,...,.„ ..,.. pn.viui.lv 1. .Ill l—n.,1 .ha, ih. v.lu..^ -., ll,-
,,,„,„v ,„ ,lu. tal.l.. :. n-.n.llv u.r.rA. .,v ^li.liUv .iilTiTi..,, rrnin .Im..
nli-failN |Mil>li>li<ii. ami wlii''!' ^vciv u
(«liaiii;i's arc due u< a mikiII corivcii.ni
n.Milual- <nv..n l.v ,li.' line A C " all -p'-"-"^'-""^ "' '•' 'M"' ■''^"■~' '"
,,,,1, .....^h. IVM.luaU nl- -llcM. i-unv,.„.,l vall.r^ nf .l,. ul^iTVLil ^v\nnUv<
f,,„„ „„, ,„„, .,„,,„ an. !.■>- ,l,an .lio^. ..v-n l.v ,li. U.nurr nu...nr<.
.,-.,,,l„ n, ,,„„„ns ,lu. Ottawa ul.Mrvati.Mi- a.i.l, a- in Tal.lr H. ." '^'H.
.,... ,1,. pha.. 1^ .-kuni.a ftnn, p-naMiun a.i.l tii,. ivM.lual In,,,, th. hnal
curve. rif MicaMirc^ air ^^ivcn in .Inail alt.T Tal.lr HI.
I Mll.l II
l.K K ()llSi;i!\ \ Til INS
l'l:ii.:
Date.
Jilll:in l):i>.
lis.-ill! .lunr Jl
4:i.'4» July 'JJ
1
434SA Aug. 1
1906
1906
OMl'OSKST 1 CiMI'MSI-Nl H-
Vol.
O-C. Vcl. I 0-C.
, 117 (11S vJ^ Ji'i Hit
»14 79") 1 fitiO
424-714 11000
•+6»0
+t)9t)
+20
+2SS
-■Jilb
.-.5.0
-o.(
-l.fi
+0 4
■-h-^.O
-80 1
-til
>-:!i 01
-31.2 +0 5
+.10.0 +3.;i
•Values publi!'h«l in L.'JM. vol 1. p '.•>'
iKIIII "t HA I :>S'M).
333
put*.
D.iir
.1 177
3.'>0(i
3.W7
4310
422B
4;«)7
441R
41J1
4 m\
4'i()J
4.Vltl
4:>9:.
4I).W
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p
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April 111
April .'II
M:iv Hi
July li
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jiiin' r_*
Jiinc Ki
Auif. .!'■>
I'.ilii
Jiini' 111
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6.-.
07
74
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M
74
tw
75
70
72
KM)
00
90
r\iii.i III
riTTAWA OnSKUVATIONrt.
.Iuli:in Day
ItlUM'.
2.4IS.S3.; 7W
s:,7 (i!i."i
'.no mr.
iiiCi s7:t
117 N."ill
17:i >>l'.t
221 ii:i:i
22:i iitio
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lilt o."
935-743
II ILirpfr;
( iiMIMM ^T I
{'OMPOVKNT II.
Vol Wl. (>-<
R75
2.". 774
Jii i:ri
25 93(1
11 i>lt
(I :;ii3
21 h7.1
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21 .-.11
2ti ■ 211';
23 939
1 li:iS
24 1113
2.'i IlKI
2.'i().'i7
25 4 IS
143
21 110
0-3(V5
+44 -H
+68-6
+83
+74-8
+t'.l-9
+(m I
+1(2 ■»>
+ S0-3
+ 4tiH
+65
+25
+ 43
+52
+ 73
+ 529
+ 73 II
+tl4ll
+51-8
+8l-t>
Vel. Wt
5
If)
5 4
4
4
3 4
4
9 9
- 4
- 3
-I4S
+ 12-8
- 3-9
+ .■!■
3
— 7 ■ .")
1
+ 3 11
00
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+ 20
1
+ lfi-3
-57
-717
-76-9
-1581
-flOH
-81
-.V)
-58-9
-tVIB
-71 8
-HI-9
-27 -6
-71-8
-04 4
-82-tl!
-tlti-9
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-40
-80-
CM"
- 4-8
+ ? «
- 3 6
+ 10 3
+ 3
9
- 4
+ 10
i
+ 15
■>
+ 1
I
-19
8
+ 5
7
-15
5
+ 8-5
-19-0
+ 3-3
+ 411
+ 5-7
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847;}7
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I'l lU.lt
AlUlNS OF IIIK DdMlNlON nlf-KHVA TOKY.
u:: p*
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4481
4:!52
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+ :i.-) •Ml:
+ 34-20
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+ .". 4.i
7.MS
2lMi3:
+ 77-Mi
Weight oil
mnnn
V,
Curv.
• (1 '17
■If.
+ co--)r)
+ 9H-4.1
+ SI -24
+ 73-13
-+- NS- 14
^+ S7-27
1+ 7S--7
1+ H(I-3V
(II
24
Rndiiil
Velocity
+ 44 -S
■'.(■.■.;i
- 10-04
-00
2S
-t- (IS-
- 20-33|
- SS-'.tol
- 70-Bi)j
- (is S3i
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52 -m!
53-52!
35-751
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_ 10 114
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f 01 00 ;
+ i(Hi(n \
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02 31
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70 10
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40 0Oi
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42-30i i
40 52
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■23
•p. = primary,
p =ser(iTia:iry.
- V^. .. ■''j?v'^kf^k^im^^];l::m^ ■K',
^-•=y-
)HBIT OK B.A.r. 5890.
335
MEASL'RKS OF B.A.C. 5890— Coii/inufd.
4219 p
42:,) H.
■::r, p
4226 H
4307 p
4307 8.
X
Vi-l,
\Vt
V.-l.
\Vt.
\\-l.
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v..
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\Vt
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4540 753
f 59-61
+ .56-50
f I)!' -99
-I-- .58-80
+ .WO*)
+ 46-63
1
1
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- 73-83
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- 85-45
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+ 60-01
+ 33-76
+ 39-61
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f 35-07
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4481 -.'■i4S
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43-10 646
4271 689
4260 654
- ,87-22
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+ 52-39
+ 58-92
+ 47-16
i
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-111 -.56
i
4233 - 483
4226-968
- 64 76
i
- ,58-77
i
4143-832
4101-890
Weiffhtod
mean
V.
\4
Ctirv.
+ 52-98
+ 22-09
-02
- -28
- 79-86
+ 22-09
■02
-28
f 40-48
+ 21-79
- -09
■28
- 78-36
+ 21-79
m
-28
+ ,54-45
+ 12-05
12
•28
- 93 48
+ 12-05
- 12
•28
Radial
Velocity
+ 74-8
- 58-1
+ 61-9
- 56-9
+ 66-1
- 81-8
^":'.7
;{;3(i
ITin.lC.VlIONS OK TIIK. D.'MIMON i IHSKRVAl nH Y.
Mi;\srHi:s ov hac. :,sw--i;,uii>,n.d
,,.w;__. ^«F-l.VT
?;i:J;^«v^ :--'Vv^
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OUBIT OF B.A.C. 5890.
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4J(10
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4JJ(i
414:1
4101
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Vcl.
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+ S5-4<)
f- 70 10
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4.50'J
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Mi:\SI l{l> III li A t'. 5890— Condnwrf.
-i.-.m ::..!
44M .MS
4;i.V2();i.")
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4271 liVI
4jri(i i;,-,i
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ll!l.07l J
730
SIMS
<r 27 112
+ (14
— ^S
+ (J2.4
V.I. ' \\\
OHBIT OK B.A.C. dSDO.
339
MEASLKK.S Of U A.C. o»'M -('■"duiunl.
Wir, p. I 4'J7
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m-'j
,5051 iJ.
\'A. W I
+ ■IS ■12' i
+ 00 ■so! 1
+ 7;i 13 S
+ 00 22
- 1-2S
- ()7
- ^28
+ 044
5051 «
V,.|. \Vt
5:r.50
00 so; ;
VlK ■ \Vt
- 03 47
- 1^2S
■07
- ■2S
65^1
AM)
IM lll.H \ I lii\> UK rilK PiiMlMiiN ullsKin Al i IHY.
MKASIURS OK B.A.C;. 5890-<'unWmied.
X
.-.ITJ |.
.■„7.
\\i
.-,.>•! |.
:i:.y» ^
\cl \Vt
\'.'l
\ . ! \Vt
V.-l
Wi
1
\Vl
vv, 1
\Vt
Vol.
\Vt.
ci'i T."..;
r (;7a> 1
1
1
4I^1 .'il^
+ .vj 117: ;
■i:i."i.' u:i."i
4.iiii iin;
- '17 .-,'. 1
. M .V, ;
— 77 ^*J
4J71 lis'i
. liKi ,;i ,
42ii() ii.M
4J:i:! is;!
4JJii iltls
41i:; s:iJ
4IIII v:«i
1 -
mi:, ',i:;.".
- ^iMn [
I'l 1':; ;
llir.ill
- 7'.i .M
l^■>^'l
• St:.:.
- 77 N_*
\,,
-■ J7 ;i."i
_'7 ■ -!■'
'_* :).s
■J ■ ."iS
V,
11
1 1
- 'J^
■-'H
li:Hl.:,l
\ floiity
• .-.Is
- 4i',.r,
^- SI r>
- M) 7
Tlic nineteen Ottawa ohservations were ^roiiiK'il into live normal places,
am! those from Lick \\<rc lal^en separately to i'orm three additional places.
In the hitter case ecitial wei^iiits were assijiiied and eacli i)lace was fiiven
approximately three time- the weight of an avera<j;e siiijrlc ( )t tawa ohservation.
The normal place- for both components are ^iven in Tal)le IV. to;:;etlu'r
with the mean phase from jieriastron. mean velocity, wcijihi, and residual
from compiiieii velocities of the preliminary elements.
OHBir t)K B.A.C. 5MJ0.
341
I AHI.I, 1\^
NUUMAL l'l.ACi;.S I.
Niimhcr.
Mian I'Ikl-,.'
Mrun Vc-I(iiity
Wwniit.
() C
1
■J.VDJIl
+42- 1
1-5
+ 0-8
2
■j:. 114.-.
+58-9
10
— 2-2
3
(1 I'.ll
+741)
3
- 10
4
II ."iil7
+01.1 ■()
15
- 2-7
5
(1 s;il
+(a:t
2 ()
- 2 9
t>
1 ^.".l
+.IS-5
15
■(- Oo
4
■J IJl
+2«0
1-5
- 0-5
8
1.' lilil
-JoO
1-5
- 1-4
\t
^jlOS
-.Vl 1)
Oo
-11) 5
W
25 0(10
-r.l-.-.
0-5
- 2-4
11
It JJT
-W 2
15
+ 10-7
u
II ."iliT
-820
10
-10-2
in
OMs
-TIM)
1-5
- ti-5
11
1 MMI
-^4.-. .-1
0-5
- 24
in
■JlJl
-:>1 1)
10
+ 9
Ul
U :i4ll
4-:iii II
10
+ 11-8
I'siiifi the grapliioal inctliod, these preliminary elements were obt: ;ned: —
/' =26 -2742 days
t = • 55
a), = :i5()°
CO, = 170°
A'l = 50 km
A'., = 47 -3 km.
7 = -2 -OS km.
T =2,418.410-794 J. I).
.\s i)revi(msly noted, one of the Lick observations was a 5j;reat help in
fixing tlH> values of K, and A', above. This plate (4:?4SA) is the third in
Table II, with v(>loeities of -25-0 km. and +;5() km. for the lirst and
second eomponents respe<'tively. It is the onlv plate sivinji any idea of
the minimum of the i)rimary or the maximum ot the secondary. The note
accompanyins the measure speaks of the secondary as the strong, and the
l)rimary as the weak comiionent. This is just the o])po.-ite to what has
been found in all other plates. Although as will be seen later, the masses
:M2
I'l ItIK \ I 1()\> (iK IIIK DciMlMov i >lt>i;il\ \ 1 1 iH V .
(if tlic I\v(i lidiiics arc ii"! very ditTcrtMil. and (•(.n-^c(iucntly the M'coiidary
iiuiv shuw >tr()n;;cr tliaii the primary in xinic cax's.
A lca>l-Miuarcs Miliitinn was ciiipldyiMl id ini|ii-()\c' llir (■lrnirnl> ulilainnl
in ilii> way. Tlii' period, deduced l.y u.-in^ ilic early i.iciv uli-ervations in
connection with oiir own. coverinii a y,real nunii.er of cycle-, was taken a>
tixed. As liad been previously sunjtoted l.y Dr. Kiny;*. tlie oii>ervati(Uis
of liotii component- weic coinhineil into one -el of oh.-ervation equations,
from the solution of which oni> one set of elements result. I'or the value
of tj ill ilic case of the tirst couiponeiii we must u-e IM) r o) in the
second. ."Sixteen oliser\ation e(|uations were formed as lollows:—
No.
8
9
10
U
12
13
14
15
IK
r.Mii.i, \
unsi;i{\ AiioN ixji .viiHNs i.
+ 1.2ti.i
+ \rM
+ 1-47.T
+ I..'i05
+ .8.S'
+ .o:n
- .4:10
Vt
- -UKS
1 • 2I)!I
1 ,'.40
I 47,")
-I 374
- .S08
- G31
r -430
- ■ IWi
+ •484
-t-Ka
- 1!1J
- • S'M
-■Sft.s
i- ■ 47t>
+ •7,').")
+ 1()3
-■440
-.l.'J4
+ 1,57
+ -.S.5.')
+ .,S4<)
- 450
+ ..521
+ .:i!»4
+ ■'«()
- . 132
- 236
-■423
- 4,-)0
- .(ITJ
- Is4
- •370
- U21
T • 12.-,
217
+ • 402
+ • 420
^•(MiX
+
-•73s
- ■ 73.5
, ir2S
T .;s<t
+ ..5.-)0
+ • M'.i
+ •4.53
+ ■021
f •;32
+ ivi;
- 0.57
-•3as
- .512
--.52H
- 42S
- .023
+ 2
+ 1
+ 2
+ 2
- U-
-f
+ 1-
+ 10
i. '» .
-10
+ 10
+ i>
+ 2
-11
SIK)
2(H)
000
700
9(KJ
.500
.500
400
51 KJ
400
TOO !
WiMKht.
200 j
.VK) j
m.
000 !
,S00 I
1
3
15
2
15
15
13
I 5
1
13
I II
I II
Where
X = 8y
11, =5^'i
z = lOUor
100/i57'
(i-^)i
•P DO vol. I. p. 327
Normal ciiuulioiis wiic dcrivcil Iruiii thi'si' as I'ollows:
21..- +\:i-7'y\iJi
I ■.)(.!(/
IV.ilz - W'iH + -229^ + :)S( )() = ()
+ 1SS77//I+ ood//, -1 ■t;i;k - ■:^^^•u +i-7:5(W' -i-ii-2:n=o
f U) 7.')2,//.- tiUL' - 'S.V^u +ll44r - l.")t)17 =
-t-tltMl: + -KVm - -.WJr +27 ■.■)()'.) = (I
+ 1S24(( -2(Ht(lr + 2i:i2 =
+ 4 lis:})' - 4()S(I =
Thi' solution of these jjave
I =+2- 1711
//, = -;5-4'.)',»
,j. = +i.ti,s,s
z = -i;-!!.')
u =+2.")()Sl
r = -j-lC-.-.S.")
wlience, 6, = +2- 17 km.
5A', = -:{•.")() km.
S/v. = +1 ■()'.) km.
hv =-()til
oco = + 14°-71
57' = + -404 day.
Ilcncp the correetod values of the elements,
r = -489
coi-4°-71
w,= 184°-71
A', = 46-5
A'., = 4S-99
7 =+09 km.
T =2,418.411 198 J. D.
These new values of the elements reducetl i;/;rr from 042 to W,\, or
nearly 28 i)er rent. The af^reement however between the romputcd and
observation eciuation residuals was not satisfactory and a second solution
was accordinKly carried through.
^- *1
;;,■> »
X'\f^/i);, -J^ fr- ' ,•' ■"''■ '^ : , j.'^i^ " i.
.-il>;.
:n\
M Ul,l' \I1"N> "^ I""- l>"\"^""^ ..ll>KHV\THliV.
N.u „uriuul i.l:i.v> w.Tc foniir,! a^ in TaMr VI
i\ni I. \ I
NdltMAI, I'l.ACKS II.
No.
1
2
3
4
a
e
7
8
•
10
11
13
13
U
15
10
MlHTl I'll
M,:in \.luiiiv
■.'4 (V.'H
■J.'i Jlii
ji; 11711
(1 ir.ii
0-4titi
t 4'Jti
•_' IV.'C.
n >.M'
•Jl Tdi'p
j.'i j.'ii'
■JCi 1(K)
U llili
1) 4jri
I Cil
U WW
+42- 1
+S8-9
+74
+UBO
+ti3-3
+ 48-5
+ -'»U
-••5
-.500
-04 .">
-04 2
-S2
-73
-45-5
-31
+30
WriKllf.
1-5
10
3
15
<) ('.
1-
- 3-7
+ 0-2
+ 4-!»
+ 0»
- 10
I'.ilUiilw.ii-l.pluiucri.-.
+
10
15
■5
10
10
4 4
- 16
- 1-3
- 0-2
- 20
+ 8-5
-10 3
- 30
+ 11
+ 4-«
Wlu'iici- the ()l)>crv:iti(>u (Miuiitions as l)cU)\v:
lAiu.i; \ II.
ObfiKltVATluN KC^l ATIONS
No.
I
2
3
4
5
6
7
8
g
10
II
\2
V.i
II
1.".
ir>
W:
+ .USJ
+ 1-201
+ 1-484
+ 1-404
+ 1-3U5
+ -940
+ G.iO
- 512
000 .
000
■ am
000
.(KX)
(KH1
-000
-01)0
IMN)
IHHI
-(KK)
-000
-000
-(KM)
-000
000
1-Oli)
- 1 ■ 20.')
1 IMi
- 1 41)4
-1-401
- 'J30
- -0.')()
r -.il-
- -.V.l'.l
- 170
+ -444
•421
240
+ •
+ •
--774
+ •400
f -.5.S'.)
+ • 170
- 470
--443
- ■ 270
+ - 020
+ -S10
- 1S5
+ -385
+ -270
+ 019
-118
- 214
--432
--477
-033
--39.')
-■2S9
--0OH
+ •124
+ -218
+ -4.19
+ -.-)03
+ OW
--5H8
-.538
-OS'J
f -218
+ •410
+ fl.->5
+ •577
+ •OOl
+ 023
+ - .505
+ -001
- 230
--425
--tws
- 008
--!K)4
+
7
-
8
+
11
+
2 tt
+
2-8
+
10
+
3
-
00
00
+ 0-8
_
1-4
—
2 4
_
2-5
-
0-7
00
\V,-lKlit,
+ .;-70o
- 200
- 4-lH)0
- -soil
+ I-IKK)
- 1 t(K)
4- 1-000
f i-;i(K)
+ 0-200
+ 2-000
- 8-500
+io-;ioo
+ 5-000
•000
- 1100
- 4 800
1-3
10
3
15
2 ()
15
10
10
with the same substitutions as before.
■* *•
.i^ir^-^rV'-- :>*i.i^
•^ *• * -lr^,' n **, 1 • *
(IKIIII OK ll.A.( . TiMMl.
345
'llif ii(inri;iU iiliiaimd Irmii llii>c were: —
■ill- i lirsO'.l;/, 7 .".17//, - ■ V.)7: -
t Itlir.//, f OOO//; f- ,V)(L- -
+ l(ISl(V/. t SOS;
+ .-)I',»7.' +
+ 1
'.)\>N f-l
21 Ir
t.
221/ -1<)
i;r.r -i;{
(i22/' - :i
us,-)/' + :i
(iSOr -
((.■)() = ()
:)7() = ()
Ihtl-O
77;{ = ()
.'lOl =0
7'.l.') = (l
from whii-li,
.r = •2>S«)
(/, =-S(il
,/, = + 1 . :^-.<)
z = - ■ li'.t
11 = + \s\:V2\
r =4-12S.");i2
and licncc
07 - + -2i) km.
5/\'i = +Sti km.
6/\, = +1 -^C. km.
5c ^ - .001,-,
5w =+l(r:5".»
57' = + .;{,-,7 (lav
'Vlwsi' gave the second corrccti'd values of the elements us follows: —
r = ■ 4S7.')
ai, =ir)°io
u, =19')° 10
A', =47. "56
A'., =.")() Ho
7 = + -:is
7' = 2,4 1S,4 11 •.").') J. D.
The valiK- of Iprc was now rodueed from 46:5 to ;?S0, but still the
asrofnient 'netween th(> coniiiuted and observation eciuation residuals was
not satisfactory, as will be seen from a glance at the last column in Table
VIII.
Another least-squares solution was therefore a{)plied, and thi' normal
places were apain set np as in Table \TII.
:{|t.
lc MiiiS-' Hi iiiK lHiMiMii\ m!1-!,1I\ \ !<'HV.
No.
t
2
3
4
A
6
7
H
10
II
\2
l:i
II
\r,
\>>
1 \ni 1 Mil
\li|!M \l. I'l \i IX III.
M. Ill I'l.ii-.-
■J I Jii'.i
■.'1 >*H1I
•ri-7i:i
■.Ml iis:i
IIV.l
1 I 111' I
1 i.i.'i
II ..T'.i
■J I :il'i
■.'I S'.KI
■.',-, 7 l:i
•J(l (ISo
I III'. I
I if><>
I 1,1 id
II 'iT'.i
M. ,11 \,l,., iiy.
+« 1
+,'*■!•
+74
+ «!)
ria :i
1 IH-.".
+ ■-'".> (1
- -:r,
-."ill <i
-W ."i
-HJ(I
-7;tf.
-:ii
Wright
<) ('. lOiiuiiiun-Klili' iiii-ri-
1 .")
- 15
10
+ o--
3-0
+ 4.7
1.5
- 0-7
■JO
- 4 1
1-5
+ 2-5
15
- 15
15
- «
■•*>
- 5 7
-.'i
- 3 2
15
+ S'.l
10
- S-li
15
- 2-5
■."»
+ 1-8
10
4- Of)
10
+ 3 3
II II
II III
, II .■,;
Ill 111
+0 41
-0 15
-0 14
-0 OJ
+01H
-0 Wi
-082
-0-68
-0 S3
+0.21
+0 11
+0 14
Tn.-li rihscrvntinii (Mniatinn^ wen- formcil as iti tin- fiillowiii)^ tuhlc: —
No.
3
4
5
fi
S
9
10
11
12
13
14
15
16
+ .975
+ 1-221
+ 1.4.'-.fi
fl.4fi5
+ 1-415
964
■fi3ti
-.523
mx)
IHHI
IHrf'
-IKIO
-000
mo
IKKI
IKKI
taiim; i\
i)iisi:i(v.\rniN i;>ir\Tio\> iir
000
-000
■000
■ 000
(KK)
IKMI
IKNI
;xx)
-1 007
-1 225
-l-4.iO
- 1 - 465
-1-421
- 9 ',7
- ma
+ -.'•>23
644
320
347
4H3
422
444
770
473
■ 6.56
-332
-3,S8
-514
-458
■497
-819
htr.i
+ .349
+ -•253
+ 022
- 113
- -216
-•472
-.527
-006
--361
--•267
- 012
-r20
+ ■221
+ •507
+ .561
+ -IIIK")
+
-•520
--504
-170
+ 116
+ -343
+ -743
+ -676
-015
+ -.5.-)7
+ ■.535
1.58
+
•1'24
-348
-790
719
-016
Wi-iRht.
+ 4 460
-0-700
-4. 680
+0-740
+4110
-2-470
+ 1-480
+0 620
+ 5 680
+3-220
-8 900
+8-640
+2-4.50
-1 800
-0-630
-::-3iKi
V - f
15
+001
10
-001
3
-0 01
1-5
+0 01
2-0
+0-01
1 -.5
+0-04
1-5
00
1-5
-002
-.5
-0-01
-5
+001
1-5
0-00
10
000
15
-001
-5
-002
1-0
-0 01
i I
00
iillllll iiK H \ ( ."SOO
;ii7
rhc IKilliillI ((lUatinii^ li-illlinc were; -
-Mx +i;<ti! ».')//, 7 IV.Iy/.. r>\-2: :{L'S((
+ IN '.(I:?!/, f iHii),/, t fi'.ti: 1 i.'i//
^ 10 7:>.')(y, f 1 ■()•_'»-■ smii
+ .")»;u^ + ■ J7:^/
f 1 7J1(/
"•oUini; tlicsc.
t LM-'r
tis:, II
t ■ Sli.Hr
- 1 Itili
t MUt/'
-;r7(i7 = (»
- •7:is/
•J 4'24=()
-•J .Mir
* .>l(i=(t
+;is7:>r
r -Olis^u
\\ IICIICI',
.r
= (Mil
,'/i
= iin
.'/•-■
= HL^i
z
= ■AVu
II
= - 1 (IS.")
V
= — • 7 ">•>
h
= +()»i km.
6A',
= +lM km.
6A',
= +-A2 km.
Of
= -\- ■()i):}7
5c<)
= -0^ •()•_'
67'
= -021 dav.
fjiviti'^ the third corrected values as follows:-
I' =2t;-2742 (lays
. = ■4912
cc, =14°-4S
CO, =194"-4S
K, =47- 19 km.
A': =')n()7 km.
7 = + -44 km.
7' =2,41S,411 .VU J. I).
The valiio of the clcinciits will he seen to ho little changed. The
value of I'/i/r was found to ho rodueod very slishtly, from iiSO to 378, hut the
agroomont hotween the oomputod and ohservation ef|uation resiihial.s was now
e.xcellent. as may ho seen in Tahle IX (v~r'), and these elements were
ai-cepleu as imai. i iic loiiowing tahle contains a summary of the preliminary,
348
ITHI.K AIKINS (W rm; DoMIMDN ollSKIiVATOin .
first, xrnnd an.l tliinl .■(.rnrtcl values. l.wtli<T witl. the pn.l.iil.l.- .Tmr of
oacli cli'ini'iit.
rAiii.i; X.
riic prohal.l*' crn.r of a siniilo ol.s,-rva,i()n of avorasf" wi'l^lit was foui.d
anil -jMi for tlio secomlary.
to he •')■() for tlif pninary coinijoni'iit
Thr prolmhl.' error of a normal place for the primary is r-M) and for
the secondary coiniionent •:.J-2.
In the ,,ul.lisl,ed note in i-.Odi. Vol IV, it is stated that it seems
,„,,1,.,1,1,, ,i,;,t the ma,-es of the stars are not very .UtTen-nt, and fn.n. the
elements deterniined aliove this would appear to he the case.
The relation I.etween the masses of tiie two stars is ^iven hy
Tn the accompanying tiiliu-e. the sin-le <'ircles indicat.> the observations
of the p.'imary and the douhh- circle- iho-e of the secondary component.
The I.ick ol.servations are .shown by an 1. within the circle.
Dominion Observaiory,
Ottawa.
June. 19]."..
OKBIT OF B.A.C. ')S9().
MW
(\
1
1
Q
1
,----
A.
/
—
• '
,''■
-
--.^
'^>
/
\
\ /
/
/
■
>
/
V
/V
/ \
/ X
^
\
\
\
^ 1
\
\
\
i /
1
©1
9
1
1
1 Y
\
^ 1 i
F
1
1
i
1
1
\
1
1
1
»
10 1^ 14 16 18 2.1 22 24 26 28 3J
\ Kl.OCITY Cl-RVE OF B. A. C. 5890.